John cummiskey



(No Model.)

W. D; ADAMS. STEAM GENERATOR.

No. 340,408. Patented Apr-.2O 1886.

N. Prrcns. QhBlo-Uihographer. WlshinglolL D. c.

Unrrnn STATES WILLIAM n. ADAMS, or nnwronanssrenon TO AND JACOB BLENDERMANN, on NEW roan,

HENRY BLENDERMANN JOHN CUMMISKEY, OF

BROOKLYN, AND SOPHIE E. ADAMS, OF NFHV YORK, N. Y.

STEAM-:GEVNERFATO a.

' SPECIFICATION forming part of Letters Patent No. 340,408, dated April 20, 1886. Application filed Februaryllt, 1886. Serial No. 191,791. (No model.)

dric boiler structures, or boilers provided with o heating fines or tubes so arranged and connected one above another in a setting that the products of combustion, after passing rearward under the first or lower boiler and for-- ward through the tubes or flues thereof, pass thence rearward under the upper boiler and between the upper and lower boilers.

The object of my invention is to afford simple provision for introducing between the two boilers a proper quantity of heated air to mingle with the unconsumed gases, as they pass rearward between the boilers, and effect their combustion.

The invention consists in the combination,

with the upper and lower boilers, arranged as one above another and connected to provide for the water-circulation from one to the other of them, of a setting for the boilers, including a furnace below the lower boiler, and sheetfiues, or fiues having height and length, but

0 little width or thickness, constructed in the side walls of the furnace, and having an inlet or inlets for fresh air, and series of outlet holes or openings arranged lengthwiseof and at a point between the boilers, whereby the heated air delivered in jets'or streams along the path of the products of combustion, as they pass between the boilers, will be caused to mingle with the unconsumed gases and effeet their consumption.

40 In the accompanying drawings, Figure 1 is a vertical longitudinal section of a steanrgenerator embodying my invention; and Fig. 2 is a vertical transverse section on the plane of the dotted line as m, Fig. 1.

Similar letters of reference designate corresponding parts in both figures.

The generator here chosen to illustrate my invention consists, essentially, of alower boiler, A, and an upperboiler, B, both of which under the boiler A,

are of cylindrical form, and contain heating 5o fines or tubes. These boilers are connected by a throat, B,whioh provides for circulation from one to the other of them, and which is here shown as near their front end. At their opposite or back ends is a saddle, 13*, superposed on the lower boiler, and on which the upper boiler, B, is supported and may move as its expansion may be greater or less than that of the lower boiler.

The boilers A B are arranged in a setting comprising a front, O, and brick-work O.

D designates the furnace, having a grate, a, and fire and ash-pit doors I) c, and in the set= ting are partition plates or deflectors d c f,

whereby the products of combustion are caused I -to take the direction indicated by arrows 111 Fig. 1 in their passage from the furnace to the chimney-outlet E.

From the furnace D the products of combustion pass over the bridge-wall Drearward 7o thence forward through the tubes or fines of the lower boiler, A, to the front thereof, thence rearward between the boilers and forward through the tubes or fines of the upper boiler, B, and, finally, rearward over the upper boiler, B, to the chimney-outlet E.

I desire to introduce heated air between the upper and lower boilers, to there mingle with whatever hot gases may be still unconsumed, and to thereby effect their combustion. To this end I construct, in the side walls of the setting, fines or heating-charnbers F. These I term sheet-fines, as they have considerable height and .length, but little width or thickness, as shown clearly in Fig. 2.

I have here shown openings or passages g at the rear of the setting, for the infiow of fresh air, and as the air is contained in these fines F in a thin sheet it will become rapidly heat 0 ed. At thev upper part the fines F are provided with longitudinal series of outlet openings or ducts h, which are situated at a point between the boilers, and which extend nearly or quite the length thereof. The hot air, issuing in jets or streams through these outletopenings it along the path traveled by the pro ducts of combustion, mingles with the uncom sumed gases and supplies the oxygen neeessary for their combustion, thereby preventing their escape in an unconsumed state.

By the term cylindrie boilers, as herein used, I do not mean that the vessels A B must be truly cylindric, but only-intend to refer to the type of structure of which they are examples.

The generator composed of the boilers A B, arranged and connected as described, and the partitions or deflectors,whereby the products of combustion are caused to take the course indicated by arrows, are not here claimed, as they form the subject of my application Serial N 0. 189,908, filed January 27, 1886.

What I claim as myinvention, and desire to secure by Letters Patent, is

\Vitnesses:

FREDK. HAYNES, HENRY McBRIDE. 

